An efficient microreactor with continuous serially connected micromixers for the synthesis of superparamagnetic magnetite nanoparticles

doi:10.1016/j.cjche.2022.12.008

中国化学工程学报 ›› 2023, Vol. 59 ›› Issue (7): 85-91.DOI: 10.1016/j.cjche.2022.12.008

• Full Length Article • 上一篇下一篇

An efficient microreactor with continuous serially connected micromixers for the synthesis of superparamagnetic magnetite nanoparticles

Wenting Fan¹, Fang Zhao¹, Ming Chen¹, Jian Li¹, Xuhong Guo^1,2

1. State Key Laboratory of Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China;
2. International Joint Research Center of Green Energy Chemical Engineering, Shanghai 200237, China

收稿日期:2022-08-21 修回日期:2022-12-23 出版日期:2023-07-28 发布日期:2023-10-14
通讯作者: Fang Zhao,E-mail:fzhao1@ecust.edu.cn;Xuhong Guo,E-mail:guoxuhong@ecust.edu.cn
基金资助:
We gratefully thank the financial support from the National Natural Science Foundation of China (21808059) and the Fundamental Research Funds for the Central Universities (JKA01221712).

An efficient microreactor with continuous serially connected micromixers for the synthesis of superparamagnetic magnetite nanoparticles

Wenting Fan¹, Fang Zhao¹, Ming Chen¹, Jian Li¹, Xuhong Guo^1,2

1. State Key Laboratory of Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China;
2. International Joint Research Center of Green Energy Chemical Engineering, Shanghai 200237, China

Received:2022-08-21 Revised:2022-12-23 Online:2023-07-28 Published:2023-10-14
Contact: Fang Zhao,E-mail:fzhao1@ecust.edu.cn;Xuhong Guo,E-mail:guoxuhong@ecust.edu.cn
Supported by:
We gratefully thank the financial support from the National Natural Science Foundation of China (21808059) and the Fundamental Research Funds for the Central Universities (JKA01221712).

摘要/Abstract

摘要： A new microreactor with continuous serially connected micromixers (CSCM) was tailored for the coprecipitation process to synthesize Fe₃O₄ nanoparticles. Numerical simulation reveals that the two types of CSCM microchannels (V-typed and U-typed) proposed in this work exhibited markedly better mixing performances than the Zigzag and capillary microchannels due to the promotion of Dean vortices. Complete mixing was achieved in the V-typed microchannel in 2.7 s at an inlet Reynolds number of 27. Fe₃O₄ nanoparticles synthesized in a planar glass microreactor with the V-typed microchannel, possessing an average size of 9.3 nm and exhibiting superparamagnetism, had obviously better dispersity and uniformity and higher crystallinity than those obtained in the capillary microreactor. The new CSCM microreactor developed in this work can act as a potent device to intensify the synthesis of similar inorganic nanoparticles via multistep chemical precipitation processes.

关键词: Microreactor, Continuous serially connected micromixers, Mixing, Nanoparticles

Abstract: A new microreactor with continuous serially connected micromixers (CSCM) was tailored for the coprecipitation process to synthesize Fe₃O₄ nanoparticles. Numerical simulation reveals that the two types of CSCM microchannels (V-typed and U-typed) proposed in this work exhibited markedly better mixing performances than the Zigzag and capillary microchannels due to the promotion of Dean vortices. Complete mixing was achieved in the V-typed microchannel in 2.7 s at an inlet Reynolds number of 27. Fe₃O₄ nanoparticles synthesized in a planar glass microreactor with the V-typed microchannel, possessing an average size of 9.3 nm and exhibiting superparamagnetism, had obviously better dispersity and uniformity and higher crystallinity than those obtained in the capillary microreactor. The new CSCM microreactor developed in this work can act as a potent device to intensify the synthesis of similar inorganic nanoparticles via multistep chemical precipitation processes.

Key words: Microreactor, Continuous serially connected micromixers, Mixing, Nanoparticles

Wenting Fan, Fang Zhao, Ming Chen, Jian Li, Xuhong Guo. An efficient microreactor with continuous serially connected micromixers for the synthesis of superparamagnetic magnetite nanoparticles[J]. 中国化学工程学报, 2023, 59(7): 85-91.

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An efficient microreactor with continuous serially connected micromixers for the synthesis of superparamagnetic magnetite nanoparticles

An efficient microreactor with continuous serially connected micromixers for the synthesis of superparamagnetic magnetite nanoparticles

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